Tornadoes and Hail in Wyoming, May 18, 1987

Name: Tornadoes and Hail in Wyoming, May 18, 1987
Start: 1987-05-18T15:09
End: 1987-05-18T17:05
Location: Wyoming

May 18, 1987 · 3 events in 3 counties and zones

2 tornado, 1 hail, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

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The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 3

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

Event by event

2 tornado, 1 hail. Local standard time, as filed.

Tornado, Washakie

When: May 18, 3:09 PM MST
Where: Washakie County
Rating: F0
Path length: 0.1 mi
Path width: 10 yd
Coordinates: 44.120, -107.570

Hail, Crook

When: May 18, 5:05 PM CST
Where: Crook County
Measured: 0.75 in hail
Coordinates: 44.270, -104.950

Tornado, Campbell

When: May 18, 4:30 PM MST
Where: Campbell County
Rating: F0
Path length: 0.1 mi
Path width: 7 yd
Coordinates: 44.280, -105.320

What these are

Tornado: A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Wyoming in 1987 Every state in 1987 This day in weather history The tornado archive for Wyoming, 1987 Warnings in Wyoming, May 1987

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 10160852, 10161705, 10161704.